Back to EveryPatent.com
United States Patent | 5,694,710 |
Mieger | December 9, 1997 |
The invention relates to a hydraulically swung trenching shovel comprising a mounting part pivoted to the front end of an excavator shovel beam, on which mounting part the shovel may be pivoted by a hydraulic piston and cylinder unit around a pivot axis extending in the working direction, the piston and cylinder unit being arranged in a manner parallel to a cutting edge of the shovel in a carrying member provided in the upper edge region thereof and the mounting part is connected with a lever comprising a coupling rod for pivoting the shovel, said piston and cylinder unit being adapted to act on said lever. In accordance with the invention the coupling rod is directly pivotally connected on the piston and at the pivot point of the piston rod on the piston at least one rotary guide runner is rotatably mounted.
Inventors: | Mieger; Rolf (Fellheimer Weg 23, 88457, Kirchdorf, DE) |
Appl. No.: | 591493 |
Filed: | May 16, 1996 |
PCT Filed: | January 25, 1995 |
PCT NO: | PCT/EP95/00272 |
371 Date: | May 16, 1996 |
102(e) Date: | May 16, 1996 |
PCT PUB.NO.: | WO95/31610 |
PCT PUB. Date: | November 23, 1995 |
May 11, 1994[DE] | 9407859 U |
Current U.S. Class: | 37/411; 37/443 |
Intern'l Class: | E02F 003/04 |
Field of Search: | 37/411,418,406,379,443 403/59,61 74/105 414/722,725,742,743,726 |
2891480 | Jun., 1959 | Marcum | 74/105. |
3772804 | Nov., 1973 | Bomeke | 37/348. |
4023623 | May., 1977 | Anderson | 74/105. |
4270286 | Jun., 1981 | Mieger | 37/103. |
4332094 | Jun., 1982 | Mieger | 37/103. |
4452545 | Jun., 1984 | Colautti | 403/61. |
4533113 | Aug., 1985 | Francart, Jr. | 74/105. |
4561505 | Dec., 1985 | Williamson | 74/105. |
4706511 | Nov., 1987 | Houston | 74/105. |
5062227 | Nov., 1991 | De Gier et al. | 37/406. |
5165647 | Nov., 1992 | Ribeiro | 403/59. |
5195385 | Mar., 1993 | Johnson | 74/105. |
5271170 | Dec., 1993 | Mieger | 37/406. |
5438772 | Aug., 1995 | Mieger | 37/406. |
Foreign Patent Documents | |||
0033966 | Aug., 1981 | EP. | |
3103987 | Aug., 1982 | DE. | |
3245673C | Jan., 1984 | DE. |